ZOA CTLR STATES OCEAN ATOPS SYS IS UNRELIABLE.

Narrative

ON APR/FRI/06; BOTH THE PRIMARY AND BACK-UP ATOP/OCEAN 21 CHANNELS EXPERIENCED COMPLETE SIMULTANEOUS CRITICAL FAILURES. THIS LEFT ATC CTLRS WITHOUT ANY ACFT POS TRACKING FUNCTIONALITY FOR AT LEAST 10 MINS. THIS TRACKING FUNCTIONALITY UPDATES AND ENSURES THE POS OF ACFT OPERATING WITHIN THE SYS. DURING THIS OUTAGE; ANY ACFT THAT MAY HAVE ACTUALLY EXPERIENCED A PROB RESULTING IN AN 'OVERDUE ACFT' RPT WOULD NOT HAVE BEEN RPTED. THE FAILURE CAUSED MANY ACFT OPERATING IN THE SYS TO INDICATE TO CTLRS THAT THEY WERE NOW OVERDUE. THIS DUAL FAILURE ALSO RESULTED IN A LOSS OF THE CONFLICT PROBE FUNCTIONALITY; WHICH IS USED TO DETECT AND ENSURE REQUIRED SEPARATION STANDARDS THAT MAINTAIN THE SAFETY OF THE SYS. BEYOND THE BASIC SAFETY ASPECT; REQUESTS FROM USERS FOR ALT AND RTE CHANGES COULD NOT BE PROCESSED DUE TO THE CTLR'S INABILITY TO ENSURE THE POS OF MANY ACFT. THE ABOVE IS A RECURRING SITUATION AS ON APR/SAT/06; BOTH THE PRIMARY AND BACK-UP ATOP/OCEAN 21 CHANNELS EXPERIENCED COMPLETE SIMULTANEOUS CRITICAL FAILURES FOR 1 MIN; AND ON APR/SUN/06; BOTH THE PRIMARY AND BACK-UP ATOP/OCEAN 21 CHANNELS EXPERIENCED COMPLETE SIMULTANEOUS CRITICAL FAILURES FOR 18 MINS.